A5009029890- Nuclear Physics and Applications
- Magnetic properties of thin films
- Advanced Electron Microscopy Techniques and Applications
- Advanced X-ray Imaging Techniques
- Electron and X-Ray Spectroscopy Techniques
- Magnetic Properties of Alloys
- Nuclear physics research studies
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Chalcogenide Semiconductor Thin Films
- Semiconductor Quantum Structures and Devices
- Advanced Materials Characterization Techniques
- Magnetic Properties and Applications
- Advanced Condensed Matter Physics
- Physics of Superconductivity and Magnetism
- Quantum Dots Synthesis And Properties
- Magnetic and transport properties of perovskites and related materials
- Nuclear reactor physics and engineering
- Mass Spectrometry Techniques and Applications
- Extraction and Separation Processes
- Nanocluster Synthesis and Applications
- Catalytic Processes in Materials Science
- GaN-based semiconductor devices and materials
- Superconducting Materials and Applications
- Commutative Algebra and Its Applications
Institute of Radio Astronomy
2000-2024
National Academy of Sciences of Ukraine
2024
Jaeder (Norway)
2023
NS Kurnakova Institute of General and Inorganic Chemistry
1998-2022
University of Antwerp
1993-2021
Prokhorov General Physics Institute
2018
Russian Academy of Sciences
1993-2018
A.V. Shubnikov Institute of Crystallography
2005-2018
St Petersburg University
2013-2017
Brookhaven National Laboratory
2007-2016
Materials that undergo a conversion reaction with lithium (e.g., metal fluorides MF(2): M = Fe, Cu, ...) often accommodate more than one Li atom per transition-metal cation, and are promising candidates for high-capacity cathodes ion batteries. However, little is known about the mechanisms involved in process, origins of large polarization during electrochemical cycling, why some materials reversible FeF(2)) while others not CuF(2)). In this study, we investigated binary fluorides, FeF(2)...
Direct mapping of the lithium spatial distribution and chemical state provides critical information on structure-correlated transport in electrode materials for batteries. Nevertheless, probing lithium, lightest solid element periodic table, poses an extreme challenge with traditional X-ray or electron scattering techniques due to its weak power vulnerability radiation damage. Here, we report nanoscale maps electrochemically lithiated graphite using energy loss spectroscopy transmission...
Field-induced switching of ferroelectric domains with a topological vortex configuration is studied by atomic imaging and electrical biasing in an electron microscope, revealing the role defects on topologically-guided change domain-wall pairs hexagonal manganite.
Electrodes for commercial lithium-ion batteries (LiBs) are typically manufactured with slurry-casting (SC) procedure. The high cost and limited energy density caused by SC procedure impede new emerging application. Developing procedures to increase the performance including improved reduced is highly desired. One of most promising technological paths achieve this goal solvent-free (SF) electrode fabrication, where no solvent involved, thus avoiding drawbacks SF fabrication has attracted...
Platinum monolayer core–shell nanocatalysts were shown to have excellent catalytic activities and stabilities. Usually, they are fabricated via electrochemical routes. Here, we report a surfactant-free, ethanol-based, wet chemical approach coating Pd nanoparticles with uniform Pt atomic layers, inspired by aerobic alcohol oxidation catalyzed the cores. The as-prepared electrocatalysts also exhibited high electrocatalytic performance toward oxygen reduction reaction.
We present a new Fourier-based exact solution for deterministic phase unwrapping from experimental maps of wrapped in the presence noise and vortices. This single-step approach has superior performance images with high gradients or insufficient digital sampling approaching 2pi/pixel therefore performs as fast practical phase-unwrapping problem applications applied optics, physics, medicine.
We systematically investigate magnetic reversal of permalloy islands in a square spin-ice geometry with situ Lorentz microscopy. Differential phase imaging reveals the presence flux channel similar to Dirac string between charge monopoles during reversal. Analysis images shows that positively and negatively charged always move together channel. Statistical analysis monopole populations system correlations emergence highly frustrated state for low magnetizations. This is explained by strong...
Li-rich Mn-based layered oxides are among the most promising cathode materials for next-generation lithium-ion batteries, yet they suffer from capacity fading and voltage decay during cycling. The electrochemical performance of material can be improved by doping with Mg. However, effect Mg at different positions (lithium or transition metals) remains unclear. Li1.2Mn0.54Ni0.13Co0.13O2 (LR) was synthesized coprecipitation followed a solid-state reaction. stage used to introduce in TM layers...
The tunability of electronic and optical properties semiconductor nanocrystal quantum dots (QDs) has been an important subject in nanotechnology. While control the emission property QDs wavelength studied extensively, lifetime not explored depth. In this report, ZnO-CdS core-shell were synthesized a two-step process, which we initially ZnO core particles, then stepwise slow growth CdS shells followed. coating shell on increased exciton more than 100 times that QD, was further extended as...
We examined thin epitaxial films ${\text{La}}_{5/8\ensuremath{-}y}{\text{Pr}}_{y}{\text{Ca}}_{3/8}{\text{MnO}}_{3}$ $(\text{LPCMO}:y=0.275\ensuremath{-}0.3)$ in situ by Lorentz transmission electron microscopy (TEM) and other methods. Clear evidence was obtained for the competing two-phase coexistence of antiferromagnetic charge-ordered (CO) ferromagnetic (FM) phases that exhibit mesoscale phase separation below metal-to-insulator transition (MIT) at $\ensuremath{\sim}164\text{ }\text{K}$....